“Imagine performing a Green Day song to Billie Joe Armstrong”: Guitarist plays Green Day classic at Liverpool's Cavern Club – only to discover Billie Joe Armstrong was filming his set

Billie Joe Armstrong of Green Day performs in this image released on October 6, 2024, at the American Music Awards 50th Anniversary Special in Los Angeles, California
(Image credit: Michael Buckner/Penske Media via Getty Images)

What better way to know you're doing a good job interpreting a song than to earn the approval of the person who wrote it? One lucky musician in Liverpool experienced exactly that when he found himself playing Green Day's 1997 classic Good Riddance (Time of Your Life) in front of none other than a (very discreet) Billie Joe Armstrong.

For guitarist Callum McMorran – a former contestant on The Voice UK – it was just another Tuesday, treating punters to an acoustic performance as part of his regular residency at Liverpool's iconic Cavern Club. However, another audience member spotted Armstrong himself among the attendees, who was even filming McMorran's performance on his phone.

“Imagine performing a @greenday song to Billie Joe Armstrong... Well our resident @callummcmorran got to on The Cavern Club front stage,” posted the Cavern Club on Instagram, to which McMorran replied, “A moment I won’t forget in a hurry.” The delighted guitarist also shared a longer version of this video, with the caption, “Cool moment tonight.”

A street performer in Mexico City experienced a similar moment when he serenaded Steve Vai with a rendition of Vai's For the Love of God outside the venue where Vai was scheduled to play. The story comes with a twist, though, as the busker, Rafael Flores, wielded not one but two guitars – much to Vai's awe.

And speaking of surprises, last year Billie Joe Armstrong brandished Steve Jones' 1974 Gibson Les Paul Custom on stage during Green Day's show at Accor Arena in Paris.

Janelle Borg

Janelle is a staff writer at GuitarWorld.com. After a long stint in classical music, Janelle discovered the joys of playing guitar in dingy venues at the age of 13 and has never looked back. Janelle has written extensively about the intersection of music and technology, and how this is shaping the future of the music industry. She also had the pleasure of interviewing Dream Wife, K.Flay, Yīn Yīn, and Black Honey, among others. When she's not writing, you'll find her creating layers of delicious audio lasagna with her art-rock/psych-punk band ĠENN.